For this case we have by definition, that the equation of a line in the slope-intersection form is given by:

Where:
m: It's the slope
b: It is the cutoff point with the y axis
We have the following line:

If the line we wish to find is perpendicular to the one given, then its slope is given by:

Then the line is:

We substitute the point:

Finally, the equation is:

Answer:
